js判断移动端系统

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" >
<meta name="format-detection" content="telephone=no">
<title>Document</title>
</head>
<body>
<script>
	var isMobile = {
		Android : function() {
			return navigator.userAgent.match(/Android/i) ? true : false;
		},
		BlackBerry : function() {
			return navigator.userAgent.match(/BlackBerry/i) ? true : false;
		},
		iOS : function() {
			return navigator.userAgent.match(/iPhone|iPad|iPod/i) ? true : false;
		},
		Windows : function() {
			return navigator.userAgent.match(/IEMobile/i) ? true : false;
		},
		any : function() {
			return (isMobile.Android() || isMobile.BlackBerry() || isMobile.iOS() || isMobile.Windows());
		}
	};

	if (isMobile.iOS()) {
		alert("apple");
	} else {
		alert("Android");
	}
</script>
</body>
</html>